CONTINUUM CONTRIBUTION TO EXCITONIC 4-WAVE-MIXING DUE TO INTERACTION-INDUCED NONLINEARITIES

Authors
BIRKEDAL D LYSSENKO VG HVAM JM ELSAYED K
Citation
D. Birkedal et al., CONTINUUM CONTRIBUTION TO EXCITONIC 4-WAVE-MIXING DUE TO INTERACTION-INDUCED NONLINEARITIES, Physical review. B, Condensed matter, 54(20), 1996, pp. 14250-14253
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
20
Year of publication
1996
Pages
14250 - 14253
Database
ISI
SICI code
0163-1829(1996)54:20<14250:CCTE4D>2.0.ZU;2-P
Abstract
We present an experimental and theoretical investigation of ultrafast transient four-wave mixing of GaAs/AlxGa1-xAs quantum wells for cohere nt excitation of exciton and continuum states. The signal appears at t he exciton resonance and is shown to consist of two contributions: an intense spectrally narrow part only present for short time delays and a weak exponentially decaying part reflecting the intrinsic coherence properties of the exciton states. The intense part of the signal is du e to the excitation of the continuum states mediated by interaction-in duced nonlinearities.